package com.candy.core;

import java.util.Scanner;

public class TestObj {
    public static void main(String[] args) {
        StringBuilder stringBuilder=new StringBuilder();
        stringBuilder.append("hello").append("java").append("test");
        System.out.println(stringBuilder.toString());
        System.out.println(Math.random());
        Scanner scanner=new Scanner(System.in);
        scanner.nextLine();
    }
}
